Tcl is lisp without parens. Doesn't get much love these days but a still a serviceable workhorse that has been gradually modernized in the last few releases.
Thanks for mentioning Tcl, in a lot of ways it resembles Lisp/Scheme, and with addition of tailcall, apply, coroutines the resemblance has increased over time. It remains very useful and versatile, and Tcl/Tk may still be the easiest way to create a GUI application that will run on several platforms.